Electrocatalysis for K 3 [Fe(CN) 6 ]/K 4 [Fe(CN) 6 ] reaction of graphite felt with functional groups in flow batteries

Graphite felt treated at 400 °C (GF-400 °C) has the best electrochemical performance, its surface has a high content of hydroxyl, which is the main active site for the K 3 [Fe(CN) 6 ]/K 4 [Fe(CN) 6 ] reaction in alkaline organic redox flow batteries.